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// Copyright 2019 Gin Core Team. All rights reserved.
// Use of this source code is governed by a MIT style
// license that can be found in the LICENSE file.
package binding
import (
"bytes"
"io/ioutil"
"mime/multipart"
"net/http"
"testing"
"github.com/stretchr/testify/assert"
)
func TestFormMultipartBindingBindOneFile(t *testing.T) {
var s struct {
FileValue multipart.FileHeader `form:"file"`
FilePtr *multipart.FileHeader `form:"file"`
SliceValues []multipart.FileHeader `form:"file"`
SlicePtrs []*multipart.FileHeader `form:"file"`
ArrayValues [1]multipart.FileHeader `form:"file"`
ArrayPtrs [1]*multipart.FileHeader `form:"file"`
}
file := testFile{"file", "file1", []byte("hello")}
req := createRequestMultipartFiles(t, file)
err := FormMultipart.Bind(req, &s)
assert.NoError(t, err)
assertMultipartFileHeader(t, &s.FileValue, file)
assertMultipartFileHeader(t, s.FilePtr, file)
assert.Len(t, s.SliceValues, 1)
assertMultipartFileHeader(t, &s.SliceValues[0], file)
assert.Len(t, s.SlicePtrs, 1)
assertMultipartFileHeader(t, s.SlicePtrs[0], file)
assertMultipartFileHeader(t, &s.ArrayValues[0], file)
assertMultipartFileHeader(t, s.ArrayPtrs[0], file)
}
func TestFormMultipartBindingBindTwoFiles(t *testing.T) {
var s struct {
SliceValues []multipart.FileHeader `form:"file"`
SlicePtrs []*multipart.FileHeader `form:"file"`
ArrayValues [2]multipart.FileHeader `form:"file"`
ArrayPtrs [2]*multipart.FileHeader `form:"file"`
}
files := []testFile{
{"file", "file1", []byte("hello")},
{"file", "file2", []byte("world")},
}
req := createRequestMultipartFiles(t, files...)
err := FormMultipart.Bind(req, &s)
assert.NoError(t, err)
assert.Len(t, s.SliceValues, len(files))
assert.Len(t, s.SlicePtrs, len(files))
assert.Len(t, s.ArrayValues, len(files))
assert.Len(t, s.ArrayPtrs, len(files))
for i, file := range files {
assertMultipartFileHeader(t, &s.SliceValues[i], file)
assertMultipartFileHeader(t, s.SlicePtrs[i], file)
assertMultipartFileHeader(t, &s.ArrayValues[i], file)
assertMultipartFileHeader(t, s.ArrayPtrs[i], file)
}
}
func TestFormMultipartBindingBindError(t *testing.T) {
files := []testFile{
{"file", "file1", []byte("hello")},
{"file", "file2", []byte("world")},
}
for _, tt := range []struct {
name string
s any
}{
{"wrong type", &struct {
Files int `form:"file"`
}{}},
{"wrong array size", &struct {
Files [1]*multipart.FileHeader `form:"file"`
}{}},
{"wrong slice type", &struct {
Files []int `form:"file"`
}{}},
} {
req := createRequestMultipartFiles(t, files...)
err := FormMultipart.Bind(req, tt.s)
assert.Error(t, err)
}
}
type testFile struct {
Fieldname string
Filename string
Content []byte
}
func createRequestMultipartFiles(t *testing.T, files ...testFile) *http.Request {
var body bytes.Buffer
mw := multipart.NewWriter(&body)
for _, file := range files {
fw, err := mw.CreateFormFile(file.Fieldname, file.Filename)
assert.NoError(t, err)
n, err := fw.Write(file.Content)
assert.NoError(t, err)
assert.Equal(t, len(file.Content), n)
}
err := mw.Close()
assert.NoError(t, err)
req, err := http.NewRequest("POST", "/", &body)
assert.NoError(t, err)
req.Header.Set("Content-Type", MIMEMultipartPOSTForm+"; boundary="+mw.Boundary())
return req
}
func assertMultipartFileHeader(t *testing.T, fh *multipart.FileHeader, file testFile) {
assert.Equal(t, file.Filename, fh.Filename)
assert.Equal(t, int64(len(file.Content)), fh.Size)
fl, err := fh.Open()
assert.NoError(t, err)
body, err := ioutil.ReadAll(fl)
assert.NoError(t, err)
assert.Equal(t, string(file.Content), string(body))
err = fl.Close()
assert.NoError(t, err)
}
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